88 karma · joined January 9, 2020
Yes, e is between 2 and 3 and Pi is between 3 and 4. There are geometrical lengths corresponding to each number.
>Isn’t it definitionally impossible to pick it as a “point along the line”?
No, it's mathematically possible to have a random process which picks a random real between 0 and n, with equal probability. Imagine it akin to throwing a dart at a line and picking the point it lands on as the number. Since there are only countably many rationals and uncountably many irrationals (i.e. not just infinitely more, but so many that you could never pair off the rationals with the irrationals, there are just too many) on any such length of the real line, chances are the number you end up with is overwhelmingly likely to be irrational.
How is any human meant to understand a billion lines of code in a single codebase? How is any human meant to understand a world where there are potentially trillions of lines of code operating?
Source: I was an adventurous 5 year old.
How is it acceptable to allow these companies to steal all of this copyrighted data and then turn around and use it to enforce their copyrights in the most heavy-handed manner? The irony is unbelievable.
There should be a law mandating the ability to convert gift cards or payment cards back into cash, or to reverse the transaction onto a credit card.
Edit: this math is bad, see sokoloff's comment below.
In seems like physicists are finding more general conserved quantities associated with more general spaces of physical operations such that not every action is reversible, but there are still conserved quantities associated to the underlying systems, AKA symmetries.
I don't have any solid physical intuition as to what makes an operation irreversible in this context, though, whether it's related to entropy or not.
Imagine a pair of denim pants, one could say it has the property of being made of denim, and when you bend the pants or move them around the room, they keep being made of denim. Anything you do to the pants that you can undo, like moving them around or bending them, those are invertible symmetries. Now imagine I rip the pants in half: they're still made of denim, but this action is not so easy to invert. So there are actions I can perform on these pants that are hard or impossible to undo, but still maintain the property of them being made of denim, these are non-invertible symmetries.
The example given in the article is a system being split into a superposition in a way that's hard or impossible to undo, sort of like the pants being torn in half, but just because the system is now in a superposition doesn't mean there weren't properties preserved along the way.
I'm not sure how to fully reconcile this except to give up and say that full amnesia is as good as having died and "someone else" is now inhabiting my body, but that doesn't seem quite right.
Continuity of experience is part of what seems to make "my" consciousness mine.